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Microstructural Evolution and Mechanical Properties of 2D–SiC f /SiC and Hastelloy N Joints Using 82.5Au–17.5Ni Brazing Filler
Author(s) -
Liu Min,
Yang Xinmei,
Zhou Haijun,
Gao Yantao,
Xia Huihao,
Huai Ping,
Zhou Xingtai,
Lu Yanling
Publication year - 2016
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201600229
Subject(s) - materials science , brazing , scanning electron microscope , composite material , foil method , alloy , raman spectroscopy , nanocrystalline material , shear strength (soil) , composite number , microstructure , energy dispersive x ray spectroscopy , metallurgy , nanotechnology , physics , environmental science , soil science , optics , soil water
In this paper, SiC fiber reinforced SiC composite (SiC f /SiC) is joined to Hastelloy N alloy using 82.5Au–17.5Ni (wt%) foil as brazing filler. The microstructural evolution of the joints is investigated using scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X‐ray diffraction (XRD), and Raman spectroscopy. The shear strengths of the joints are tested by the mechanical testing machine. The results show the formation of nanocrystalline graphites, Ni 2 Si layer, and Ni 31 Si 12 phases. With increasing temperature, Ni 2 Si is transformed gradually into Ni 31 Si 12 . The shear strength reaches a maximum value of 24.5 MPa when the joint is brazed at 1 000 °C for 30 min.